Barometric Pressure Forecast for Herrin, Illinois
Barometric pressure forecast for Herrin, Illinois — a coal-country city in Williamson County in the hills of far southern Illinois, known as Little Egypt. See current barometric pressure through tornado-season storms, humid summers and ice-prone winter fronts.
Download Pressure Pal to track barometric pressure and get migraine alerts for Herrin and your area.
Pressure and weather in Herrin
Herrin sits in the rolling, wooded hills of southern Illinois, not far from the Shawnee National Forest and roughly halfway between the Mississippi and Ohio Rivers. This is the southern edge of the Midwest, where Gulf moisture arrives readily and the region lies on the northern fringe of Dixie Alley, the southeastern tornado corridor. Spring lows tracking through the Mississippi Valley draw warm, humid air north, then drag a cold front across, with pressure falling steadily ahead and rebounding sharply behind; severe storms can develop along that line from March through May. Summers are hot and sticky, with heat-driven storms. In winter, cold air from the north meets Gulf moisture over the area, producing freezing rain and ice storms. Spring and midwinter are the most variable periods.
What this means for you
Herrin's pressure swings peak in spring when lows draw Gulf moisture toward southern Illinois, and again with winter ice-storm setups. A barometric pressure forecast can show those falling stretches early, and logging symptoms in a migraine tracker app may indicate whether your weather migraine attacks arrive before a front or as the pressure recovers.